Encontrados 16 documentos, a visualizar página 1 de 2
Ion-exchanged zeolite as a hybrid system: Fluoxetine removal and antibacterial ...
Demiti, Gabriela Maria Matos; Homem, Natália Cândido; Felgueiras, Helena Prado; Ribeiro, Anna Carla; de Abreu Filho, Benício AlvesThe increasing consumption of antidepressants, aggravated by the coronavirus disease 2019 (COVID-19) pandemic, has resulted in the detection of compounds such as fluoxetine in drinking water. This substance is highly toxic to aquatic organisms and has the potential for bioaccumulation in aquatic environments. This study evaluated the effects of modifying natural zeolites through ion exchange to enhance their ad...
Physico-chemical and electrostatic surface characterisation of mica mineral and...
Ribeiro, Anna Carla; Andrade, Murilo Barbosa; Quesada, Heloise Beatriz; Beltran, Laiza Bergamasco; Bergamasco, RosângelaThe combined approach of specific surface area (SSA), porosity, microprobe analysis (EMPA), transmission electron microscopy (TEM), scanning electron microscopy (SEM) equipped with EDX and infrared spectroscopy (FTIR) provided the mica mineral physico-chemical and morphological characterisation. The electrostatic surface properties were assessed through the determination of the Point of Zero Charge (pHPZC) by t...
Surface modification of a polyethersulfone microfiltration membrane with graphe...
Homem, N. C.; Beluci, N.; Amorim, S.; Reis, R. L.; Vieira, A. M. S.; Vieira, M. F.; Bergamasco, Rosângela; Amorim, M. T. Pessoa dePolyethersulfone microfiltration membranes (mPES) were modified with polyethilenimine (PEI) and graphene oxide (GO) by layer-by-layer self-assembly method via electrostatic interaction using a pressurized filtration system. The high positively charge of PEI allowed it to be easily assembled on the polyethersulfone substrate, and also to receive the negative layer of GO. Several techniques were applied to charac...
Development of a prototype for the treatment of ater contaminated with glyphosate
Santos, Julio Cesar Maciel; Rubio, Andressa Jenifer; Sousa, Jean Carlos Araujo de; Almeida, Ana Carolynna Severo; Bergamasco, RosângelaOne of the current challenges is to meet the demands for quality water since the contamination of bodies of water has been intensified in the last years with the increase in the use of pesticides. Therefore, finding a way to remove contamination by pesticides from water becomes a relevant work. In this study, it was presented the design and construction of a pilot-scale batch reactor prototype in order to remov...
Removal of the herbicide Glyphosate using activated carbon impregnated with met...
Rubio, Andressa Jenifer; Bergamasco, Rosângela; Yamaguchi, Natália UedaWith the increasing use of several pesticides in agriculture, including the Glyphosate which is the herbicide most widely consumed worldwide, there is a need for the development of diversified and effective water treatment, since glyphosate consumption can cause serious health problems on animals, humans and plants. As an alternative treatment, the removal of glyphosate from the water can be obtained with the u...
Coagulation/flocculation/flotation/nanofiltration processes using Moringa Oleif...
Camacho, Franciele P.; Bongiovani, Milene C.; Silva, Mariana O.; Coldebella, Priscila F.; Amorim, M. T. Pessoa de; Bergamasco, RosângelaThis study investigated the efficiency of Moringa oleifera (MO) seeds as natural coagulant in coagulation/flocculation/dissolved air flotation (C/F/DAF), followed by nanofiltration (NF) for Microcystis protocystis and microcystin-LR removal. The methodology adopted in this work was performed in two steps: 1) coagulation/flocculation/dissolved air flotation (C/F/DAF) process using the MO extracted in saline solu...
Avaliação da remoção dos poluentes do efluente de curtume tratado pelos process...
Borba, Fernando Henrique; Módenes, Aparecido Nivaldo; Espinoza-Quiñones, Fernando Rodolfo; Manenti, Diego Ricieri; Nogueira, DanieleNeste trabalho foi avaliada a eficiência dos processos eletro-Fenton e foto-Fenton na remoção dos parâmetros físico-químico da DQO, cor e turbidez, assim como o nível de toxicidade, no tratamento do efluente de curtume. O processo da eletro-Fenton apresentou eficiência de remoções de 75, 92 e 90%, da DQO, cor e turbidez, respectivamente. O processo foto-Fenton alcançou remoções de aproximadamente 100% da DQO, c...
Evaluation of the COD and the C/N ratio in the anaerobic treatment of fruit and...
Sgorlon, Juliana Guerra; Rizk, Maria Cristina; Bergamasco, Rosângela; Tavares, Célia Regina GranhenDaily, there are generated large quantities of fruit and vegetable wastes on wholesale fruit and vegetable markets, local orthofruit shops and supermarkets. The excessive generation of these wastes can cause environmental problems. So, the aim of this study was to evaluate the anaerobic biodegradation of fruit and vegetable wastes by the COD and C/N ratio monitoring. The wastes were collected in a central distr...
Sensorial and rheologic evaluation of a chocolate-based drink produced with wat...
Moreira, Ricardo Wagner Mori; Madrona, Grasiele Scaramal; Branco, Ivanise Guilherme; Bergamasco, Rosângela; Pereira, Nehemias CurveloSoy is a food rich in proteins and its cost is lower when compared to animal protein. However, it is still under-consumed, especially in the Western world. Cheese whey is a byproduct of the dairy industry originated from the production of cheese, and is very harmful to the environment when disposed improperly, given that it then might become a pollutant. Its treatment is usually expensive, but its composition i...
The benefits of using natural coagulants to obtain potable water - doi: 10.4025...
Bongiovani, Milene Carvalho; Konradt-Moraes, Leila Cristina; Bergamasco, Rosângela; Lourenço, Beatriz Sayuri Sakaniva; Tavares, Célia Regina GranhenThis work aims to evaluate the benefits of obtaining potable water from natural coagulants, in function of the removal of the parameters color, turbidity and compounds with absorbing in UV-254 nm, using Tanfloc SS as a coagulant. To that end, coagulation/flocculation/sedimentation tests were performed in jar test with surface water featuring high color/turbidity. The coagulation pH (3.0 to 9.0) and the concentr...